XKG v XKF [2025] SGHCF 66

Case Details

• Citation: [2025] SGHCF 66
• Court: High Court of the Republic of Singapore (General Division - Family Division)
• Decision Date: 10 December 2025
• Coram: Teh Hwee Hwee J
• Case Number: District Court Appeal No 2 of 2025
• Hearing Date(s): 11 July, 5 November 2025
• Appellant: XKG
• Respondent: XKF
• Counsel for Appellant: Chenthil Kumar Kumarasingam, Oh Zhen Hao Thaddeus (Hu Zhenhao) and Muhammad Matin Bin Abdul Razak (Withers KhattarWong LLP)
• Counsel for Respondent: Han Guangyuan Keith, Ammani Mathivanan and Phee Wei Qi Shanice (Oon & Bazul LLP)
• Practice Areas: Mental Capacity; Capacity to execute a Lasting Power of Attorney

Summary

The judgment in [2025] SGHCF 66 provides a definitive exploration of the mental capacity required to execute a Lasting Power of Attorney (LPA) under the Mental Capacity Act 2008 (MCA). The appeal arose from a dispute between the brother of the donor (the Appellant) and the donor’s only son (the Respondent) regarding the validity of an LPA executed by P, an 87-year-old woman, on 24 August 2023. The central legal question was whether P possessed the requisite mental capacity at the specific moment of execution to understand, retain, and weigh the implications of granting broad decision-making powers over her personal welfare and property to her brother and nephew.

Justice Teh Hwee Hwee dismissed the appeal, affirming the lower court's decision that the presumption of capacity under s 3(2) of the MCA had been successfully rebutted. The court’s analysis was anchored in the two-stage test for capacity: the clinical component, involving an impairment of the mind or brain, and the functional component, involving the inability to make a decision because of that impairment. The court found that P’s diagnosis of moderate dementia, coupled with her profound inability to recall significant assets and her failure to grasp the legal consequences of the LPA, rendered the instrument invalid. The judgment emphasizes that capacity for an LPA is not merely about expressing a preference for a donee but requires a functional understanding of the "relevant information" associated with the delegation of legal authority.

The decision is doctrinally significant for its detailed articulation of what constitutes "relevant information" in the context of an LPA. The court held that a donor must appreciate that an LPA is a legal document that remains effective even after the loss of capacity and that it empowers a donee to make binding decisions that the donor may no longer be able to countermand. By scrutinizing P’s performance on cognitive assessments, such as the Mini-Mental State Examination (MMSE), alongside her factual lack of awareness regarding her $5.7 million property portfolio, the court reinforced the necessity of a holistic assessment that bridges clinical findings with functional realities.

Ultimately, [2025] SGHCF 66 serves as a protective benchmark in Singapore’s mental capacity jurisprudence. It highlights the court’s duty to safeguard vulnerable individuals from executing binding legal instruments when they lack the cognitive depth to appreciate the gravity of the transaction. The dismissal of the appeal underscores that while the law presumes capacity, this presumption cannot withstand clear evidence of a donor’s inability to process the fundamental nature and consequences of the power they are purportedly conferring.

Timeline of Events

1. 15 September 2008: The Mental Capacity Act 2008 (2020 Rev Ed) commences, establishing the statutory framework for LPAs in Singapore.
2. 2017: Initial observations of cognitive decline in P are noted by family members and medical professionals.
3. 2020: P is formally diagnosed with dementia and is prescribed daily medication to manage the condition.
4. 24 November 2022: A significant point in P's medical history where her cognitive state was monitored, showing continued decline.
5. 13 July 2023: P is hospitalized following a fall. During this period, medical assessments indicate she lacks the capacity to make decisions regarding her discharge and care plans.
6. 21 July 2023: Clinical evaluations during P's hospitalization reinforce the diagnosis of cognitive impairment.
7. 25 July 2023: Geriatric assessments confirm P is suffering from moderate dementia.
8. 1 August 2023: P remains in a state of cognitive deficit, with medical records noting orientation and memory issues.
9. 2 August 2023: Further medical documentation of P's inability to manage complex personal affairs.
10. 15 August 2023: P is discharged from the hospital; her condition is characterized as moderate dementia with associated behavioral issues.
11. 22 August 2023: Preparatory steps are taken for the execution of the LPA and a related Statutory Declaration.
12. 24 August 2023: P executes the LPA (Form 1) and a Statutory Declaration (SD). The LPA appoints XKG as the donee and his son as the replacement donee.
13. 7 September 2023: Post-execution medical or legal reviews occur, documenting P's status shortly after the signing.
14. 8 September 2023: A relevant date in the factual chronology following the execution of the instruments.
15. 18 September 2023: Further assessments are conducted, which the Respondent later relies upon to challenge the LPA.
16. 8 December 2023: Formal legal challenges regarding P's capacity begin to take shape in the lower courts.
17. 14 December 2023: Procedural milestones in the District Court proceedings.
18. 18 December 2023: Continued procedural activity in the lower court.
19. 25 January 2024: Filing of initial applications to set aside or declare the LPA invalid.
20. 3 April 2024: A procedural date in the Originating Summons process.
21. 15 April 2024: The Respondent files Originating Summons (Amendment No 2), seeking a declaration of P's incapacity.
22. 3 May 2024: Hearing or filing date in the ongoing litigation.
23. 4 May 2024: Related procedural date in the lower court.
24. 13 May 2024: Further evidence or submissions are tendered to the court.
25. 6 June 2024: Lower court proceedings continue with the examination of evidence.
26. 13 June 2024: Relevant date for evidence or orders in the District Court.
27. 17 September 2024: Pre-trial or interim hearing date in the Family Justice Courts.
28. 19 September 2024: Procedural orders are issued by the District Court.
29. 13 November 2024: Final stages of the substantive hearing in the lower court.
30. 14 November 2024: Conclusion of the evidence phase in the District Court.
31. 20 December 2024: The District Court delivers its decision, finding that P lacked capacity to execute the LPA.
32. 3 April 2025: The Appellant files District Court Appeal No 2 of 2025.
33. 23 May 2025: Procedural date for the management of the appeal.
34. 23 June 2025: Further appellate filings and submissions.
35. 11 July 2025: The first substantive hearing of the appeal before Teh Hwee Hwee J.
36. 30 October 2025: Final submissions or clarifications are provided to the High Court.
37. 3 November 2025: The hearing process is formally closed.
38. 5 November 2025: Final hearing date; the court reserves judgment.
39. 10 December 2025: The High Court delivers its judgment, dismissing the appeal.

What Were the Facts of This Case?

P is an 87-year-old foreign national and a permanent resident of Singapore. The family dynamics at the heart of this dispute involve three primary individuals: P, her only son XKF (the Respondent), and her brother XKG (the Appellant). The Respondent, aged 62, resides in Australia, while the Appellant, aged 91, and his son (P’s nephew, aged 60) reside in the United States. The conflict was precipitated by P’s execution of a Lasting Power of Attorney (LPA) in Form 1 on 24 August 2023. This LPA appointed the Appellant as the sole donee and his son as the replacement donee, effectively granting them comprehensive authority over P’s personal welfare and her property and affairs, while excluding her son, the Respondent.

The factual matrix is characterized by P’s significant and documented cognitive decline. While initial signs were noted as early as 2017, P was formally diagnosed with dementia in 2020 and began daily medication. By July 2023, her condition had deteriorated to "moderate dementia," a diagnosis confirmed by geriatricians during her hospitalization following a fall on 13 July 2023. During this hospital stay, medical professionals assessed P as lacking the mental capacity to make decisions regarding her own discharge and future care plans. Her living conditions prior to hospitalization were described as unsanitary and cluttered, and she required significant assistance with basic daily activities. She also exhibited episodes of aggressive behavior and disorientation.

Despite these clinical assessments, on 24 August 2023—shortly after her discharge—P executed the LPA. Simultaneously, she executed a Statutory Declaration (SD) in which she purported to disclaim ownership of two residential properties in Singapore. These properties were valued at approximately $5.7 million. In the SD, P declared that the Appellant was the "true owner" of these properties and that she held them only as a nominee. This was a critical factual point, as the Respondent contended that P’s lack of awareness of her own assets was a primary indicator of her incapacity. The Respondent challenged the validity of the LPA, leading to the lower court's determination that P lacked the mental capacity to execute the instrument.

The Appellant’s case rested on the argument that P retained capacity at the material time. He emphasized the statutory presumption of capacity under s 3(2) of the MCA and argued that P’s decision to appoint him was consistent with her long-standing intentions. He maintained that P understood she was giving him the power to "look after her." However, the evidence presented by the Respondent painted a different picture. Medical records and testimony revealed that P had profound memory deficits. She was unable to recall that she owned properties worth millions of dollars, and at times, she even struggled to recall that she had a son. Her performance on the Mini-Mental State Examination (MMSE) was consistently poor, with scores of 11/30 and 14/30, indicating significant impairment in orientation, recall, and attention.

The procedural history involved an Originating Summons (Amendment No 2) filed by the Respondent on 15 April 2024. The District Court, after reviewing the medical evidence and the testimony of witnesses present during the execution, ruled on 20 December 2024 that P lacked the requisite mental capacity. The Appellant then brought this appeal to the High Court, challenging the finding of incapacity. The High Court was thus required to conduct a deep dive into the clinical and functional aspects of P’s mental state on the day she signed the LPA, weighing the medical diagnoses against the Appellant's assertions of her "lucid" preferences.

What Were the Key Legal Issues?

The primary legal issue was whether P had or lacked mental capacity when she executed her LPA on 24 August 2023. This central question required the court to navigate the statutory requirements of the Mental Capacity Act 2008 and apply the established two-stage test for capacity. The specific sub-issues included:

• The Rebuttal of the Statutory Presumption: Whether the Respondent had provided sufficient evidence to rebut the presumption under s 3(2) of the MCA that "a person must be assumed to have capacity unless it is established that the person lacks capacity." This involved determining if the burden of proof, on a balance of probabilities, had been met.
• The Clinical Component of s 4(1) MCA: Whether P suffered from an "impairment of, or a disturbance in the functioning of, the mind or brain" at the material time. This required an evaluation of the diagnosis of "moderate dementia" and its impact on P's cognitive architecture.
• The Functional Component of s 4(1) MCA: Whether P was "unable to make a decision for himself or herself in relation to the matter" because of the identified impairment. This necessitated an analysis under s 5 of the MCA.
• The Definition of "Inability to Decide" under s 5 MCA: Whether P was unable to (a) understand the information relevant to the decision, (b) retain that information, (c) use or weigh that information as part of the decision-making process, or (d) communicate her decision.
• The Scope of "Relevant Information" for an LPA: What specific information a donor must be able to process to validly execute an LPA. This included understanding the nature, purpose, and legal effect of the LPA, as well as the consequences of granting broad authority to a donee over personal welfare and property.
• The Weight of Cognitive Assessments: How much weight should be given to MMSE scores and clinical geriatric assessments versus the observations of lay witnesses and the certificate provider who were present during the execution of the LPA.

How Did the Court Analyse the Issues?

The court’s analysis was a meticulous application of the Mental Capacity Act 2008 framework, guided by the principles in [2019] SGHCF 15 and Re BKR [2015] 4 SLR 81. Justice Teh Hwee Hwee emphasized that capacity is both "issue-specific" and "time-specific," meaning the court must focus on P’s ability to make the specific decision to execute an LPA on 24 August 2023. The court noted that under s 3(2) of the MCA, the starting point is the presumption of capacity, and the burden of proving incapacity on a balance of probabilities rests on the party asserting it (at [33], citing Wong Meng Cheong v Ling Ai Wah [2012] 1 SLR 549).

The Clinical Component

The court found the clinical component of the s 4(1) test to be clearly established. P had a documented history of cognitive decline since 2017 and a formal diagnosis of dementia by 2020. By July 2023, multiple medical professionals, including geriatricians, had diagnosed her with "moderate dementia." The court accepted that this diagnosis constituted a clear "impairment of, or a disturbance in the functioning of, the mind or brain." The Appellant did not substantively challenge the existence of this impairment but argued that it did not necessarily translate into a functional inability to execute the LPA.

The Functional Component: Information Relevant to the Decision

The core of the court’s reasoning focused on the functional component—whether P could make the decision to execute the LPA. Under s 5(1) of the MCA, a person is unable to make a decision if they cannot understand, retain, or weigh the "information relevant to the decision." The court defined the "relevant information" for an LPA as follows:

"it is my judgment that P lacked the requisite mental capacity to engage in the decision-making process for executing the LPA, being unable to follow and/or process the explanation that was given to her in relation to the nature, purpose and legal effect of the LPA" (at [5]).

The court elaborated that this information includes understanding that the LPA is a legal document that remains valid even if the donor loses capacity, and that the donee will have broad powers to make binding decisions about the donor's personal welfare and property. Crucially, the donor must appreciate the "consequences" of granting such authority.

Analysis of P’s Ability to Decide

The court examined several factors to conclude P lacked the functional ability to decide:

• MMSE Performance: The court reviewed P’s Mini-Mental State Examination scores, which were consistently low (e.g., 11/30 and 14/30). These scores reflected significant deficits in orientation, memory, and attention. While the court acknowledged that MMSE scores are not a "litmus test" for capacity, they provided strong clinical evidence of the severity of P's impairment.
• Inability to Recall Significant Assets: A pivotal factor was P’s inability to recall her assets. P owned two properties worth approximately $5.7 million, yet she could not identify them or their value. The court held that understanding one's assets is essential when executing an LPA that grants a donee power over "property and affairs." If a donor does not know what they own, they cannot appreciate the scope of the power they are delegating.
• Quality of Memory and Retention: The court noted P’s inability to retain information for even short periods. This meant that even if the LPA was explained to her during the execution, she could not retain that explanation long enough to weigh it and make a reasoned decision. The court found that P’s memory was so impaired that she could not "follow and/or process the explanation" given to her (at [5]).
• Grasping Consequences: The court found that P did not understand the "consequences" of the LPA. She did not appreciate that she was giving the Appellant the power to make life-altering decisions for her, such as where she would live or how her millions of dollars would be spent. The court observed that P’s expressed reason for the LPA—that she "wanted her brother to look after her"—was a simple preference that did not equate to an understanding of the legal mechanism of a power of attorney.

The Statutory Declaration and Asset Awareness

The court also considered the Statutory Declaration (SD) executed alongside the LPA. In the SD, P claimed she was not the "true owner" of the $5.7 million properties. The court found this highly relevant; if P believed she did not own the properties, she could not have understood that she was granting the Appellant the power to manage those very assets through the LPA. This disconnect further demonstrated her lack of understanding of the "relevant information."

Evaluation of Witnesses

The court weighed the testimony of the certificate provider and the Appellant’s witnesses against the medical evidence. It found that the lay observations of P being "lucid" or "knowing what she wanted" were insufficient to overcome the clinical findings of moderate dementia and the functional failures in understanding the LPA's legal effect. The court emphasized that a donor might appear "normal" in casual conversation but still lack the cognitive depth required for complex legal transactions.

What Was the Outcome?

The High Court dismissed the appeal, upholding the District Court's finding that P lacked the mental capacity to execute the LPA on 24 August 2023. The court concluded that the Respondent had successfully rebutted the presumption of capacity under s 3(2) of the MCA. The operative finding of the court was as follows:

"For the above reasons, I dismiss the appeal." (at [87]).

As a result of this dismissal, the LPA executed by P is invalid and cannot be registered or acted upon. The court’s decision effectively maintains the status quo of P’s incapacity, meaning that decisions regarding her personal welfare and property must be made through other legal channels, such as the appointment of a deputy by the court, rather than through the instrument she purported to execute.

Regarding costs, the court did not make an immediate award but provided directions for further submissions if the parties could not reach an agreement. The judgment stated:

"If costs for the appeal cannot be agreed, submissions on costs, limited to 5 pages, are to be tendered 14 days from the date of this decision." (at [88]).

The outcome reinforces the protective jurisdiction of the Family Division of the High Court. By invalidating the LPA, the court ensured that P’s significant assets (including the $5.7 million properties) and her personal welfare are not placed under the control of a donee appointed through a process where the donor lacked the cognitive ability to understand the transaction. The dismissal also serves as a final judicial determination on P's mental state at the material time, providing clarity for any future proceedings involving her estate or care.

Why Does This Case Matter?

The judgment in [2025] SGHCF 66 is a landmark decision for practitioners dealing with mental capacity and the execution of LPAs. Its significance lies in several key areas of the Singapore legal landscape:

Clarification of "Relevant Information" for LPAs

The case provides much-needed clarity on the threshold of understanding required for an LPA. It establishes that it is not enough for a donor to simply want someone to "look after them." The donor must understand the "nature, purpose and legal effect" of the document. This includes the fact that the LPA is a delegation of legal power that persists after capacity is lost. This distinction between a "simple preference" and "legal capacity" is a vital doctrinal contribution that will guide future assessments by certificate providers and courts.

The Role of Asset Awareness in Capacity

The court’s focus on P’s inability to recall her $5.7 million property portfolio highlights that capacity to manage "property and affairs" is inextricably linked to an awareness of what those affairs are. Practitioners must now be even more vigilant in ensuring that donors have a basic grasp of their significant assets before certifying an LPA. The judgment suggests that a profound lack of awareness of one's wealth is a strong indicator of functional incapacity in the context of an LPA.

Balancing Clinical and Functional Evidence

The decision reinforces the "conjunctive" nature of the two-stage test in s 4(1) of the MCA. It demonstrates how clinical evidence (like a diagnosis of moderate dementia and low MMSE scores) provides the necessary foundation for a finding of functional incapacity. However, the court also showed that clinical evidence must be tied to the specific decision at hand. The detailed analysis of how P’s dementia specifically prevented her from "following and processing" the explanation of the LPA provides a roadmap for how medical evidence should be integrated into legal reasoning.

Protective Nature of the MCA

The case underscores the protective spirit of the Mental Capacity Act 2008. While the law respects autonomy and presumes capacity, it also recognizes the need to intervene when an individual is no longer able to protect their own interests. By setting aside an LPA executed by a donor with moderate dementia who could not grasp the consequences of the document, the court affirmed its role as a safeguard against the potential for exploitation or the unintended loss of control over one's life and assets.

Impact on Certificate Providers

For solicitors and medical practitioners who act as certificate providers, this case is a stern reminder of the depth of the inquiry required. The court’s scrutiny of the explanation given to P suggests that certificate providers must do more than merely read the form to the donor; they must ensure the donor actually processes and understands the "relevant information" and the "consequences" of the instrument. Failure to do so may lead to the instrument being set aside in subsequent litigation.

Practice Pointers

• Verify Asset Awareness: When acting for a donor executing an LPA for property and affairs, practitioners should specifically test the donor's awareness of their significant assets. A donor who cannot recall owning multi-million dollar properties is likely to be found to lack capacity.
• Document the Explanation Process: Certificate providers should keep detailed notes of how the "nature, purpose, and legal effect" of the LPA was explained to the donor and, more importantly, how the donor demonstrated their understanding of that explanation.
• MMSE Scores as Red Flags: While not dispositive, consistently low MMSE scores (e.g., below 15/30) should be treated as a significant red flag. In such cases, a formal geriatric assessment specifically addressing the capacity to execute an LPA should be sought.
• Distinguish Preference from Capacity: Practitioners must distinguish between a donor’s simple desire (e.g., "I want my brother to help me") and the functional capacity to understand the legal mechanism being used to achieve that desire (the LPA).
• Assess "Consequences": Ensure the donor understands that the donee’s power is broad and that the donor may not be able to revoke it easily once capacity is lost. The donor must appreciate the "consequences" of granting such authority.
• Timing of Execution: Be cautious when a donor has recently been hospitalized for cognitive issues or a fall. The court in this case looked closely at medical assessments made just weeks before the LPA was signed.

Subsequent Treatment

As a recent decision from December 2025, [2025] SGHCF 66 stands as a current and authoritative application of the MCA. It follows the ratio that a donor lacks mental capacity to execute an LPA if they cannot understand, retain, and weigh information relevant to the decision, including the nature, purpose, and legal effect of the LPA and the consequences of granting authority to a donee. It is expected to be frequently cited in future disputes involving the validity of LPAs executed by individuals with progressive cognitive impairments like dementia.

Legislation Referenced

• Mental Capacity Act 2008 (2020 Rev Ed)
• Mental Capacity Act (Cap 177A, 2008 Rev Ed), Sections 1, 3(2), 3(3), 3(5), 4, 4(1), 5, 5(1), 5(4), 8, 11(1), 20(1), 21
• English Mental Capacity Act 2005

Cases Cited

• Applied/Relied On:
  • Wong Meng Cheong v Ling Ai Wah [2012] 1 SLR 549
  • BUV v BUU [2020] 3 SLR 1041 / [2019] SGHCF 15
• Considered/Followed:
  • Re BKR [2015] 4 SLR 81
  • Re BKR (HC) [2013] 4 SLR 1257
  • Goh Yng Yng Karen v Goh Yong Chiang Kelvin [2021] 3 SLR 896
  • WEW v WEX [2022] SGHCF 32
  • VVC v VVE [2021] SGFC 94
  • BHR v BHS [2013] SGDC 149

Source Documents

• Judgment PDF ([2025] SGHCF 66)
• eLitigation Case Summary